Which caprimulgiform bird is an exclusively fruit-eating nocturnal bird?

The oilbird (Steatornis caripensis) is the only nocturnal, exclusively frugivorous bird within the order Caprimulgiformes.1

While most other members of this order are insectivorous, the oilbird is considered an aberrant species that feeds primarily on the fruits of palm, laurel, and bursera trees. It is a nocturnal bird native to South America that roosts in caves, where it utilizes echolocation to navigate in the dark. Unlike other caprimulgiforms, which typically have soft, camouflaged plumage, the oilbird possesses a strong, hook-tipped bill and distinct physical characteristics suited to its specialized diet.213